Here is the full list of all 61 Hentai Girls achievements.
6-13 Clear
6-12 Clear
6-11 Clear
6-10 Clear
6-9 Clear
6-8 Clear
6-7 Clear
6-6 Clear
6-5 Clear
6-4 Clear
6-3 Clear
6-2 Clear
6-1 Clear
5-8 Clear
5-7 Clear
5-6 Clear
5-5 Clear
5-4 Clear
5-3 Clear
5-2 Clear
5-1 Clear
4-5 Clear
4-4 Clear
4-3 Clear
4-2 Clear
4-1 Clear
3-6 Clear
3-5 Clear
3-4 Clear
3-3 Clear
3-2 Clear
3-1 Clear
2-6 Clear
2-5 Clear
2-4 Clear
2-3 Clear
2-2 Clear
2-1 Clear
1-6 Clear
1-5 Clear
1-4 Clear
1-3 Clear
1-2 Clear
1-1 Clear
6-14 Clear
6-15 Clear
7-1 Clear
7-2 Clear
7-3 Clear
7-4 Clear
7-5 Clear
7-6 Clear
7-7 Clear
7-8 Clear
7-9 Clear
7-10 Clear
7-11 Clear
7-12 Clear
7-13 Clear
7-14 Clear
7-15 Clear